One of my pet peeves is people saying, "I switched to <x browser>; it's so fast!!" (Especially irksome when they switch from a Chromium-based browser to another Chromium-based browser...)
Folks, the main reason your new browser is faster than your old one is that your old one has 12 extensions installed, each of which are consuming memory and CPU on every page load. (Yes, even your password manager and adblocker.) The second reason is standard self-delusion and wishful thinking.